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They got to vote their conscience during the primary and will get in November.
It voting for Trump was going to be an issue then they should not have volunteered to be a delegate. You do not get to take all the perks of being a delegate and then not be willing to do what you were sent to the convention to do....vote for the candidate that won your state/district.
I am unfamiliar with what the perks are for being a delegate m2c. Besides getting to vote and represent your constituents what else happens? Here's the problem and correct me if I'm wrong. If someone wins a majority of votes in the Primaries

then ALL the delegates are bound to support him/her, right? But what if some of them don't want to support him/her? I mean don't you become a delegate BEFORE you know who the presumptive nominee will be? Maybe they volunteer or are appointed because they believe someone else will win. Thank you for your reply and Happy Thursday to thee! :)